.site-header.unified-header{display:flex;align-items:center;gap:32px;height:88px;min-height:88px;flex-wrap:nowrap;padding:0 4.3vw;position:relative;z-index:20}
.unified-header .brand{flex-shrink:0;margin:0}
.unified-header nav.site-sections{display:flex;align-items:center;gap:24px;min-width:0;margin:0;font-size:16px;white-space:nowrap}
.site-sections a{display:flex;align-items:center;min-height:48px;border-bottom:2px solid transparent;color:var(--muted)}
.site-sections a[aria-current=page]{border-color:var(--violet);color:var(--ink)}
.site-sections a:hover{color:var(--ink)}
.unified-header nav.site-tools{display:flex;margin-left:auto;gap:8px;flex-shrink:0}
.site-tools a{display:flex;align-items:center;justify-content:center;width:44px;height:44px;color:var(--muted)}
.site-tools a:hover,.site-tools a[aria-current=page]{color:var(--violet)}
.site-tools svg,.site-menu>summary svg{width:22px;height:22px}
.site-tools .preview-sound{width:44px;height:44px}
.site-tools .preview-sound span{display:none}
.site-menu{position:relative;flex-shrink:0;font-size:15px}
.site-menu>summary{display:flex;align-items:center;gap:8px;cursor:pointer;min-height:44px;list-style:none}
.site-menu>summary::-webkit-details-marker{display:none}
.mobile-menu-label{display:none}
.site-menu-panel{position:absolute;right:0;top:calc(100% + 12px);width:256px;max-width:calc(100vw - 40px);padding:12px;background:var(--surface);border:1px solid var(--line);border-radius:12px;z-index:40}
.site-menu-panel a{display:flex;align-items:center;min-height:44px;padding:8px 12px;margin:0;color:var(--ink);font-size:15px}
.site-menu-panel [hidden]{display:none!important}
.site-tools .appearance{margin:0}
.site-tools .appearance>summary{width:44px;height:44px;justify-content:center;padding:0}
.site-tools .appearance>summary span{display:none}
.site-tools .appearance fieldset{z-index:40}
.site-tools .appearance fieldset{width:180px;padding:8px;box-shadow:none}
.site-tools .appearance legend{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
.site-tools .appearance label{position:relative;min-height:44px;padding:0 12px;gap:12px}
.site-tools .appearance input{position:absolute;width:1px;height:1px;opacity:0}
.site-tools .appearance label:has(input:checked){font-weight:600;background:var(--bg);border-radius:12px}
.site-tools .appearance label:has(input:focus-visible){outline:2px solid var(--violet);outline-offset:1px}
.site-tools .appearance .theme-dot{width:14px;height:14px;flex-shrink:0}
.course-search{margin:1rem 0 2rem;max-width:36rem}
.course-search label{font-size:.9rem;color:var(--muted)}
.course-search .search-field{display:flex;align-items:center;gap:.5rem}
.course-search input[type=search]{min-width:0;width:100%}
.course-search button{padding:.65rem;flex-shrink:0}
.course-search button svg{width:20px;height:20px}
.answer-coverage{font-size:.875rem;line-height:1.6;color:var(--muted)}
.saved-empty{padding-block:2rem;color:var(--muted)}
.page-actions{display:flex;flex-wrap:wrap;align-items:center;gap:8px 24px;margin:12px 0 24px}
.page-actions .ask-context-link,.page-actions .queue-action{display:inline-flex;align-items:center;gap:8px;min-height:44px;margin:0;padding:4px 0;border:0;border-radius:0;background:transparent;box-shadow:none;color:var(--violet);font:inherit;font-size:14px;line-height:1.4;text-decoration:none;max-width:100%;white-space:normal}
.page-actions svg{width:20px;height:20px;flex-shrink:0;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.page-actions .queue-action:disabled{opacity:1;color:var(--muted);cursor:default}
.page-actions a:hover,.page-actions button:not(:disabled):hover{text-decoration:underline;text-underline-offset:4px}
.page-actions [hidden]{display:none}
.unified-header :is(a,summary):focus-visible{outline:2px solid var(--violet);outline-offset:3px}
@media(max-width:1050px){
 .site-header.unified-header{height:auto;min-height:112px;display:grid;grid-template-columns:1fr auto auto;gap:0 12px;padding:8px 20px 0}
 .unified-header .brand{grid-column:1;grid-row:1;justify-self:start}
 .unified-header nav.site-tools{grid-column:2;grid-row:1;margin:0}
 .site-menu{grid-column:3;grid-row:1}
 .desktop-menu-label{display:none}.mobile-menu-label{display:inline}
 .unified-header nav.site-sections{grid-column:1/-1;grid-row:2;display:flex;gap:24px;overflow-x:auto;flex-wrap:nowrap;max-width:100%;font-size:15px;scrollbar-width:thin;scrollbar-color:var(--line) transparent}
 .site-sections a{flex:0 0 auto;min-height:48px}
 .site-menu-panel{top:calc(100% + 8px)}
 .site-tools .appearance{position:static}
 .site-tools .appearance fieldset{right:20px;top:64px;max-width:calc(100vw - 40px)}
}
@media(max-width:380px){
 .site-header.unified-header{column-gap:8px}
 .unified-header nav.site-tools{gap:0}
 .unified-header .site-menu>summary{gap:4px}
 [data-theme=observatory] .site-header.unified-header .brand-space{width:48px;height:36px}
}
@media(max-width:680px){.unified-header nav.site-sections{gap:20px}}